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<h1>Developer Guide</h1>The GWT Developer Guide contains a variety of topics that explain the various
 moving parts of the toolkit.<div class="tipContainer">
<div class="tipCallout">Tip</div>
<div class="tipBody">For a list of JRE classes that GWT can translate out of the box, see the
      <a href="jre.html">documentation for the GWT JRE emulation library</a>.</div>
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<h2>Topic Guide</h2>
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<a xmlns="" href="com.google.gwt.doc.DeveloperGuide.Fundamentals.html">Fundamentals</a>
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<synopsis>Core GWT concepts such as
           <a xmlns="" href="com.google.gwt.doc.DeveloperGuide.Fundamentals.JavaToJavaScriptCompiler.html">compiling Java source into JavaScript</a>,
           <a href="com.google.gwt.doc.DeveloperGuide.Fundamentals.HostedMode.html">debugging</a>,
           <a href="com.google.gwt.doc.DeveloperGuide.Fundamentals.CrossBrowserSupport.html">cross-browser support</a>,
           and <a href="com.google.gwt.doc.DeveloperGuide.Fundamentals.Modules.html">defining modules</a>.</synopsis>
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<a xmlns="" href="com.google.gwt.doc.DeveloperGuide.UserInterface.html">Building User Interfaces</a>
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<synopsis>As shown in
           <a xmlns="" href="com.google.gwt.doc.DeveloperGuide.UserInterface.WidgetGallery.html">the gallery</a>,
           GWT includes a variety of pre-built Java
           <a href="com.google.gwt.doc.DeveloperGuide.UserInterface.WidgetsAndPanels.html">widgets and panels</a>
           that can serve as cross-browser building blocks for your
           application.</synopsis>
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<a xmlns="" href="com.google.gwt.doc.DeveloperGuide.RemoteProcedureCalls.html">Remote Procedure Calls</a>
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<synopsis>An easy-to-use RPC mechanism for passing Java objects to and from
           a server over standard HTTP.</synopsis>
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<a xmlns="" href="com.google.gwt.doc.DeveloperGuide.JUnitIntegration.html">JUnit Integration</a>
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<synopsis>Integration with JUnit lets you test your AJAX code almost as
           easily as any other Java code.</synopsis>
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<a xmlns="" href="com.google.gwt.doc.DeveloperGuide.Internationalization.html">Internationalization</a>
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<synopsis>Easily support multiple locales with a single code base.</synopsis>
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<a xmlns="" href="com.google.gwt.doc.DeveloperGuide.JavaScriptNativeInterface.html">JavaScript Native Interface (JSNI)</a>
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<synopsis>Mix handwritten JavaScript into your Java classes to access
           low-level browser functionality.</synopsis>
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